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is a Home Rule Municipality that is the most populous city in Rio Grande County, Colorado, United States. The population was 4,529 at the 2000 census.
According to the United States Census Bureau, the city has a total area of 2.0 square miles (5.1 km²), of which, 1.9 square miles (4.9 km²) of it is land and 0.1 square miles (0.1 km²) of it (2.56%) is water.